How Many Days? And Pay in book, Pin, Welcome pack e.g
Your welcome pack normally comes within 2 - 5 working days.
Your card is normally 7 - 10 working days.
Pin is normally 2 - 4 days
and pay in book normally follows 2 - 5 days after.
Given the current series of postal strikes - I'd guess you'll have to wait 7-10 working days.
If you have not heard by then - call the number on the website or call in at your local branch.